Self-aggregation properties of new ester-based gemini surfactants and their rheological behavior in the presence of cosurfactant — monolaurin

“…The zero-shear viscosity of the solutions was determined from steady shear rate measurements by extrapolating the viscosity in shear-rate curves to the zero shear-rate. 40…”

Section: Rheological Measurementsmentioning

confidence: 99%

New ester based gemini surfactants: the effect of different cationic headgroups on micellization properties and viscosity of aqueous micellar solution

Bhadani

Tani

Endo

et al. 2015

Phys. Chem. Chem. Phys.

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A new series of ester functionalized cationic gemini surfactants having different cationic headgroups (i.e. piperidinium, pyrrolidinium, morpholinium and quaternary ammonium) have been synthesized and characterized using NMR and Mass spectroscopy. These new gemini surfactants were investigated for their micellization and viscosity properties using surface tension, conductivity, fluorescence and rheology thechniques. The physicochemical properties of the aqueous surfactant system were influenced by polarity, size and the nature of cationic headgroups as the surface, thermodynamic and viscosity properties of these gemini surfactants were found to be dependent on the type of cationic headgroup. The current research finding establishes the structure-property relationship of the surfactant molecule specifically taking into account the dominant role displayed by the nature of the cationic headgroup.

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“…Besides, the length of the hydrophobic group, the structures of the connecting group and the hydrophilic group play important roles in the surface activity [1][2][3][4][5][6]. Gemini surfactants have many good properties, such as lower Krafft point, superior temperature stability, salt resistance, good compatibility and good self-assemble ability [7][8][9][10]. Gemini surfactants are widely used in industry, medicine, cosmetics and high technology [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Surface Active Properties of a Gemini Imidazoline Amphoteric Surfactant

2016

J Surfact & Detergents

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The gemini imidazoline amphoteric surfactant was prepared in two steps. We first reacted lauric acid and triethylenetetramine to obtain the intermediate called bisalkyl‐bis‐imidazoline. We analyzed it by 1H NMR, and the yield was 82.45 % according to perchloric acid non‐aqueous titration. The intermediate was then quaternized using sodium 2‐chloroethanesulfonic acid in a mixture of isopropyl alcohol and water, during which we controlled the pH between 8 and 9 and the temperature between 80 and 90 °C to prepare C12‐bis‐imi. The air–liquid surface tension was measured by a tensiometer at 298 ± 0.1 K. The results show that the critical micelle concentration (CMC) was 2.25 × 10−3 mol/L and the surface tension at the CMC (γCMC) was 30.42 mN/m. C12‐bis‐imi showed a synergistic effect in combination with lauric alcohol with nine ethylene oxide groups (AEO9). The synergistic effect is most striking when the mole ratio of C12‐bis‐imi/AEO9 was 1/1, and the corresponding CMC was 9.79 × 10−5 mol/L and the γCMC was 37.61 mN/m.

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Self-aggregation properties of new ester-based gemini surfactants and their rheological behavior in the presence of cosurfactant — monolaurin

Cited by 38 publications

References 50 publications

Sustainable oleic and stearic acid based biodegradable surfactants

Sustainable oleic and stearic acid based biodegradable surfactants

New ester based gemini surfactants: the effect of different cationic headgroups on micellization properties and viscosity of aqueous micellar solution

Synthesis and Surface Active Properties of a Gemini Imidazoline Amphoteric Surfactant

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